Adjustable book-rest.



N. STREIT.

ADJUSTABLE BOOK REST.

APPLICATION FILED DEO.9,1909.

Patented June 13, 1911.

2 SHEETSSHEBT 1.

' Nb STREIT.

ADJUSTABLE BOOK REST.

APPLICATION FILED 1130.9,1909.

Patented June 13, 1911.

2 SHEETSSHEET 2.

lllino s h invented new and useful Improvernents nigiAdjiistable Book-Rests, of

- which 'th 1o1iewing is a specification.

This, invention relates. to adjustable book rests, and is designed to aiford animproved device; tor supporting, books and the like, which; ideyice maybe readily lattached to or removed fromflchairs. or other like articles of .fu gnit ura and is' 'adaptedto support th'ebook in anyldesired and convenient position for reading a v .To such ends ',-th 1*s inventlon consists in certa n novel ,features, ..ofconstruction, ar-

i rangement and-combination of parts, which are tully-ydescribedin this specification and the essentialelements of which are particularlypointedputin the claim.

The invention is. learly drawings fu rnished .herewith in which-.

Figured. isia perspective view of the hook restyF g. 2 1s aside elevation of the same showing certain partsbroken away, Fig. 3 is a vertical cross section taken on line 3-3 of Fig. .2 a ifragmental plan view of the book support -proper, Fig. 5 is a horizontal section taken on line 5 .5 of Fig; 2,

' Fig. 6'is a plan of a. post viewed from below,

Fig. 7 is a fragmentalplaii of a longitudinally adjustable bar, Fig. S'is a plan of said bar reversed, Fig. 9 is a plan of one ofthe pieces'viewed from below,.Fi -g. 10 is a cross section taken online lO-1O of Fig. 1 and showing a. certain clamp in side elevation and Fig. 11 is a detail vertical section through the lower end of a standard and screwclamp. s

In these views 10, is astandard which may be secured to the arm of an ordinary chair by a screw clamp 11, which is swiveled upon the lower end of the standard 10, to turn I upon a vertical axis. Any simple form of swivel devic'e may be employed and may comprise for instance a bolt 12, seated in the end of the standard and turning in an aperture formed in the clamp 11. A nut 13, screwed upon the end of the bolt and seated in a recess in the clamp, locks the parts together. A screw 1 1, threaded in the. clamp furnishes means for clamping the device upon the arm of the chair. A set screw .14 threaded in a lug 14", that extends up' from ADJUSTABLE ROCK-REST."

the clamp 11, furnishes means illustrated the .uponihe other.

OFFICE. I

"NICKOLAS s'rnnrr, on CHICAGO, ILLINOIS;

June 13, 1911,

for clamping the standard in place.

Extending out from the upper end of the standard 10, is a horizontal member which may comprise an arm 15, upon which is slidlngly mounted a movable bar '16, that can ries at one end'the book support proper l7. Any suitable form of sliding connection ber tween the bar and arm may be employed and for. the purpose of illustration I have shown a rib 18, 'on the arm that is seated in a groove 19, in the bar. Overhanging edges '20, are provided upon the rib 18, and run in undercut grooves 21, in the bar 16, thereby providinga simple form of means for prevent ing accidental separation of the arm and bar. A stop 22 on the bar is arranged to contact with a stop 23, on the arm to limit the outward movement of thebar' and a plate 24:, upon the end of the bar limits'the movement ofthe latter in the opposite direction; i The book support proper 17, is directly carried by a jointed post 25, which is swivel'ed upon the bar 16, by a swivel here shown as a bolt 26, seated in the lower end of the post 25, and turning in an aperture27, inthebar" 16, a nut 28, beingthreaded upon the lower end of the bolt 26, and turning: in a recess or socket 29, in the bar- 16.-' Ifdesired, fplates' 30,31, may be securedfto theadjacent faces of the post and" bar, respectively, to receive any wear caused by the rubbing of one part The post 25, preferably. comprises two members.32,.33, hinged together on a horizontal line at 34, whereby the upper member 32, may turn upon the lower member. A set screw 35, is threaded in one of the members 32, 33, and bears against the other, whereby by tightening up the set screw, the two members may be rigidly clamped together to fix' the angular position of one with respect to the other.

Adjustably supported upon the -jointed post 25, is the book rest proper 17, which as shown comprises a central member or back piece 36, and two leaves 37, 38, hinged thereto. The centralm'ember or baclr piece 36, has an undercut groove '39, upon its lower Lface' in which fits the upper end of the upper member 32-, of the hinged post 25, said upper end having a neck d0, formed with overhanging edges 41, that run in the undercut groove, A clamping screw 42, is

threaded in -the member 32,01 the h ng post and bears against the side of the back 5 piece 36, to hold the book support 1.7, in

any desired position of adjustment on the post 25. The back piece 36, has laterally ex tending ears 43, at its ends which ears are arranged in pairs and between the members 7 of each pair is pivotally seated an car 44,

are adapted to bear upon-the exposed leaves through the adjustment of the movable that projects out from each leaf 37, 38.

Pintle pins 45, 46, connect the ears of each the downward movement of the leaves to a position approximately in line with the'back piece.

Flanges 50, are provided upon the near edges of the leaves 37, 38, to prevent a book from slipping down when the-book support proper is tilted at an angle with the horizontal. Slidably mounted in said flanges are clamps 51, which have fingers 52,'that of the book. Pins 53, are provided upon said clamps, which are slidingly seated in,

vertical sockets in the flanges 50; B simply pressing the clamp down upon the leaves of the book the latter are heldin place because the pressure of the leaves against the finger of the clamp tends to bind the pin in the socket, thereby affording a simple and convenient means for clamping down the leaves.

In use thedevice may be clamped to the arm of a chair, and-the book support proper adjusted to a position in front of the user,

parts. The book rests proper may be prop Witnesses:

erly located by turning the standard upon its swivel, and drawingl the bar 16, out to the desired position; t e book rest proper may now be turned upon its swivel to bring it into alinement and then tilted u on its horizontal pivot to bring it Into the esired inclination. The back piece and leaves may be slid forward or backward upon the.

hinged post to raise or lower the back piece and-leaves, and the latter maybe tilted upon their hinges to accommodate the book.

I realize that various alterations and modifications of this device are possible without departing from the spirit of m invention, and I do not therefore desire to imit myself to the exact formof construction shown and described.

I claim as new and desire to secure by,

Letters Patent:

In an adjustable book rest, the combination of a standard, provided at its lower end with a clamp swiveled thereto on a vertical axis, said standard terminating at itsupper end in a horizontal member, a; two part post swiveled upon said member, at its end, on a vertical axis, the two parts of the post being pivoted together on a horizontal axis, a book rest slidingly mounted upon the upper'end of the pivoted art of the post, and arranged to move bo ily thereon in a: line longitudinal of itself, a clamping screw for holding the two partsof the post in fixed position, and a clamping-screw for holding the book rest in fixed position on the post.

In witness whereof, I have hereunto set my hand at Chicago, Cook county, Illinois,

this 24th day of November 1909.

4 NIGKOLAS STREIT,

CHARLES O. SHERVEY, FANNIE F. RICHARDS. 

